[O] modify/edit a org-time-stamp

[Uwe Brauer]

Hi 

I have an org file which is full of time-stamps from last year stuff
like <2016-11-14 Sat>. I thought I could easily modify/edit the time
stamp but I cannot, every time I move the cursor into such a stamp, I
cannot edit as I wish. It looks as if that entry is somehow blocked.

Of course I could switch the mode say to text mode and then edit the
entry, but what could I do within orgmode?

Thanks

Uwe Brauer